Del Rawlins wrote:

I doubt if anybody would be willing to pay the sort of prices that would
be required to give the sugar daddy a decent return on his investment.
Probably cheaper to buy a new lycoming at that point.

Dingdingding. So it would seem that we're getting something
for the cost of that new Lycoming. It may be development costs
that were paid out long ago, but the cost of equivalent development,
engineering, and testing in an auto conversion brings it up to the
same level.

Dave 'on par' Hyde